Instrumentation for Dynamic Nuclear Polarization and Application of Electron Decoupling for Electron Relaxation Measurement

Author

Nicholas Howard Alaniva, Washington University in St. LouisFollow

ORCID

http://orcid.org/0000-0001-9191-3048

Date of Award

Winter 12-15-2019

Author's School

Graduate School of Arts and Sciences

Author's Department

Chemistry

Degree Name

Doctor of Philosophy (PhD)

Degree Type

Dissertation

Abstract

Dynamic nuclear polarization nuclear magnetic resonance (DNP NMR) exploits internal electron spin and nuclear spin interactions to increase sensitivity and uncover valuable information regarding structure and dynamics of a system. To manipulate these interactions, instrumentation is developed to combine high-power microwave and radiofrequency irradiation with the ability to spin samples at the magic angle (MAS) at temperatures from 90 K to 4.2 K. Electron decoupling uses frequency-modulated microwaves to mitigate the electron-nuclear dipolar interaction, improving signal intensity and resolution in DNP NMR experiments. Electron decoupling is combined with short DNP periods to encode electron spin information in polarized nuclear signal. The application of electron decoupling is expanded to a system of dilute 14N-endohedral C60.

Language

English (en)

Chair and Committee

Sophia E. Hayes

Committee Members

Richard Mabbs, Dewey Holten, Cornelius von Morze, Alexander B. Barnes,

Comments

Permanent URL: https://doi.org/10.7936/j0h1-6v14

Recommended Citation

Alaniva, Nicholas Howard, "Instrumentation for Dynamic Nuclear Polarization and Application of Electron Decoupling for Electron Relaxation Measurement" (2019). Arts & Sciences Electronic Theses and Dissertations. 1989.
https://openscholarship.wustl.edu/art_sci_etds/1989